High-power transmitting apparatus for wireless telephones.



P. J. HACKETT.

HIGH POWER TRANSMITTING APPARATUS FOR WIRELESS TELEPHONES.

APPLICATION FILED MAYII. I9I5.

1 46,420. Patente& Nov. I3, 191?.

WIT/V588 INVE/V'TOFI A TTOR/VEV PAUL J. HAGKETT, OF SEATTLE, WASHINGTON.

HIGH-POWER TRANSMITTING APPARATUS FOR WIRELESS TELEPHONES.

Specification of Letters Patent.

Patented Nov. 13, 19 17.

Application filed May 17, 1915. Serial No. 28,783.

To all whom it may concern Be it known that I, PAUL J. HACKETT, a

citizen of the United States. and a residentis multiplied or increased when used with a source of high frequency oscillations.

Other objects will appear as my invention is more fully explained in the following specification, illustrated in the accompanying drawings and pointed out in the appended claims.

Referring to the drawings, Figure 1 is a set up of my apparatus. Fig. 2 is a plan of one of my air gap condensers.

Referring more particularly to the drawings Fig. 1 all apparatus to the left of line Aa constitutes a high frequency source of oscillations and is made up of a generator 1 preferably operating at 500 to 600 volts. 2 are choke coils, 3 an arc, 4 a primary coil which causes an induction in a secondary coil 5 which is grounded as at 6 and is va riably connected to an aerial 7. Wires 8 and 9 from the aerial and the secondary respectively, are connected to my improved transmitting apparatus. Wire 8 is connected in parallel to flexible diaphragms 10 of one or more air gap condensers. Wire 9 is similarly connected to rigid diaphragms 11 of the said condensers. The condenser proper is illustrated more completely in Fig. 2. The pairs of diaphragms as just described are separated by'an insulating ring 12. A complete unit of condensers consists of two or more, preferably four, which are connected by cover plates 13 having tubes 14 which terminate in a single tube 15 and mouth piece 16. Each condenser unit is actuated by ordinary.telephone or similar receivers as 17 and 17 Receivers 17 are connected in either series or parallel with one of my high power transmitter sets 18 as in my application No. 793,460 or similar device. One or more receivers 17 may be cut into the line between the receivers 17 and the transmitter 18. The receiver 17 sets up vibrations which are received by another high power transmitter set 19 which is similar to 18. The transmitter 18 is connected to receivers 17 WlllCl'l actuate condensers 16 as previously described. v

It will be understood that the one voice or source of sound waves talking into the transmitter set 18, will actuate "a plurality of receivers 17, each of which actuates a four diaphragm air gap condenser, thus greatly lncreasing. the strength of the sound waves before applying them to the condenser units.

It will be further understood that any desired number of receivers 17 may be grouped to operate a similar number of high power transmitters 19. each of which will operate throughweceivers l7 many more condenser'units. by operating a large number of condenser units, that the strength of the voice or sound may be raised to any desired quantity for the purpose in hand. a

While I have shown a particular form of embodiment, of my invention, I am aware that many minor changes therein, will readily suggest themselves to others skilled in the art Without departing from the spirit and scope of the invention and I therefore, desire to avoid being limited to the exact form shown and described, except as pointed out in the appended claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent, is

1. In a device of the character described,-

the combination of a source of high frequency oscillations and means for increasing the capacity of an audible sound, the said means including a plurality of condenser units, each composed of a plurality of single air gap condensers which operate in unison, a plurality of receivers each of which actuates a separate condenser unit, a high power transmitter which actuate-s all of the said receivers, whereby the electromagnetic waves of increased volume are'sent out from an aerial. 1

2. In a device of the character described, the combination of a source of high frequency oscillations and means for increasing the capacity of an audible sound, comprising a high power transmitter, receivers actuated thereby, condensers connected in parallel and actuated by certain of said receivers, another high power transmitter actuated by one of the said receivers, other It is thus seen that receivers actuated by the last mentioned transmitter, and other condenser units connected in parallel with the first mentioned condenser units and actuated by the last mentioned receiver, whereby electromagnetic waves of different amplitudes may be sent out from an aerial.

3. Ina device of the character'described, the combination with a source of high frequency oscillations and an oscillatin cir cuit including a plurality of con enser units each consisting of a plurality of condensers and connected in multi le in said circuit, el'ectro-magnetic means or varying the capacity of all of said condensers simultaneously including a transmitter and a source of current therefor, a receiver actuated by said transmitter, other receivers actuated by said transmitter, transmitters each actuated by a respective last mentioned receiver and each actuating a respective condenser unit, a transmitter actuated by the first mentioned receiver and having a source of current connected thereto, a plurality of receivers actuated by the last mentioned transmitter, and a plurality of transmitters each actuated by a respective last mentioned receiver and actuating a respective unit of the remaining condenser units.

PAUL J. HACKETT. 

